My stains (Organic) are in my deep end. Anyone if the group have experience with the link below as a tool (Purity out spot)? All chems are stabilized.
Thanks

Purity Spot Remover Out Spot - PoolSupply4Less
Simple to use. Chemical action quickly removes most stains and fresh rust spots in seconds Replaces harsh stones that gouge and produce unsightly scratches Protective of plaster Soaker pad isolates acid from water.
www.poolsupply4less.com
Thanks